i just laid mine in. i put a piece of indoor outdoor carpet over them. i really like them underfoot. kills the noise. i can take a nap if i want to. all the stuff on the floor keeps everything from flying out. i would just try a little silicone in the corners first. no great gobs. if it works great if not then try the adhesives. illok down the road and think about removal later good luck. oh yeah u can also try 2 face carpet tape in the corners